1 - Documento de Trabajo Ivie WP-Ivie 2023-01 - A System of Built-up, Building Height

We obtain a layer in the original resolution, 2.5m From the original information distributed by x 2.5m, and in all the lower resolutions as the the IGN, and accessible in the Download previous layers. [...] provided directly by IGN, is the Digital nor- The information is distributed in the sheets malized Surface Model of the building of the National Topographic Map (MTN) class (MDSnE2,5) from the LiDAR infor- 1/50,000 —MTN50—. [...] These have 46 duplicate files —corresponding to values, which come from the automatic the same MTN sheet— as they are projected treatment of the LiDAR point cloud, and in the 29 and 30 zones, and 23 duplicate files which curiously have not been filtered by the —corresponding to the same MTN sheet— IGN, were treated in the processing of the as they are projected in the 30 and 31 zones. [...] Finally we make a mosaic by merging all building height layer with 2.5m x 2.5m reso- the raster files from the previous step, av- lution and in ETRS89-LAEA from the original eraging pixels when they overlap, and ad- information requires the reprojection of the justing the extend of the final layer to the 1,110 downloaded raster files, originally in reference grid generated from the ad- four differ. [...] 10 Documentos de Trabajo Ivie As an example, map 1 shows the percentage The data for the 1km x 1km resolution for the of built-up in 20m x 20m pixels of the urban 3 variables was transferred to the grid statis- area of Valencia, corresponding to the layer tics of Goerlich (2023a) in vector and tabu- Built-up_epsg3035_20m..